Increased spinal dynorphin contributes to chronic nicotine-induced mechanical hypersensitivity in the rat.

Abstract:

:Chronic nicotine administration has been shown previously to produce mechanical hypersensitivity in the rat although the mechanism of this effect is unknown. Rats treated with chronic systemic nicotine 3.6 or 8.6 mg/(kg day) for 14-21 days displayed mechanical hypersensitivity coincident with an increase of prodynorphin immunoreactivity and dynorphin content within the spinal cord. The administration of dynorphin antiserum intrathecally significantly attenuated chronic nicotine-induced mechanical hypersensitivity. Our results suggest that chronic nicotine administration produces an increase in spinal dynorphin content and release that contributes to mechanical hypersensitivity.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Lough C,Young T,Parker R,Wittenauer S,Vincler M

doi

10.1016/j.neulet.2007.06.002

subject

Has Abstract

pub_date

2007-07-05 00:00:00

pages

54-8

issue

1

eissn

0304-3940

issn

1872-7972

pii

S0304-3940(07)00663-5

journal_volume

422

pub_type

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